[name_f]Lydia[/name_f] and [name_m]Miles[/name_m] feel like an absolutely perfect g/b set – both with each other and with your older kids’ names! From your list, I’d suggest [name_f]Lydia[/name_f] and [name_f]Eliza[/name_f] for g/g and [name_m]Miles[/name_m] and [name_m]Thomas[/name_m] for b/b.
[name_f][/name_f]Other ideas you may like:
[name_f][/name_f][name_f]Celia[/name_f] and [name_m]Vincent[/name_m]
[name_f][/name_f][name_f]Claudia[/name_f] and [name_f]Estelle[/name_f]
[name_f][/name_f][name_m]Calvin[/name_m] and [name_m]Graham[/name_m]
[name_f][/name_f][name_m]Felix[/name_m] and [name_f]Olive[/name_f]
[name_f][/name_f][name_m]Felix[/name_m] and [name_f]Gwen[/name_f]
[name_f][/name_f][name_f]Flora[/name_f] and [name_m]Lionel[/name_m]
[name_f][/name_f][name_m]Vincent[/name_m] and [name_f]Louisa[/name_f]
And of course most of these name sets could be mixed-and-matched!